I remembered something now, maybe it could be interfering in the process. I was not able to connect with vsgallery extensions, and found a solution that worked
here. So my devenv.exe.config is with something like this:

That doesn't help much. I need the raw html response. Try this. After collecting the network requests, select File - Save - All Session. It will save all sessions as a .saz file. Please zip it and upload somewhere. Thanks

If i enter this URL in a browser on my laptop: http://az320820.vo.msecnd.net/packages/NHibernate.3.3.1.4000.nupkg which is the package for nhibernate the url is unknown.
However if i try it from other machines on the same network (all with DHCP identical settings) then it works. So it points to an issue with my machine. However if i put my laptop on another network it downloads fine!

Its got me completely confused as to what the issue could be.

Something else is that the link works on another PC (in a browser) but the package wont download via Nuget in VS2010.

Can anyone help or give me any pointers cos im pulling my hair out now.